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MathGroup Archive 2006

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Re: a[[0]] equivalent to a[[-1]] and so forth

  • To: mathgroup at smc.vnet.net
  • Subject: [mg65153] Re: a[[0]] equivalent to a[[-1]] and so forth
  • From: "Jens-Peer Kuska" <kuska at informatik.uni-leipzig.de>
  • Date: Wed, 15 Mar 2006 23:59:27 -0500 (EST)
  • Organization: Uni Leipzig
  • References: <dv8v5k$n91$1@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

Hi,

lst = {4, 5, 6};

Table[lst[[Mod[i, Length[lst]] + 1]], {i, -6, 6}]

??

Regards

  Jens

"Alexandre Costa" <amscosta at uem.br> schrieb im 
Newsbeitrag news:dv8v5k$n91$1 at smc.vnet.net...
| Dear Group,
| I have a simple issue:
| If  I have a list such as :
| a = {4, 5, 6};
| How can I do this in an elegant way:
| a[[0]] equivalent to a[[-1]]
| a[[-1]] equivalent to a[[-2]]
| and so forth.
|
| I thought of a[[If[i <=0, i - 1, i]]] would 
solve the problem
| but I want a more elegant way of doing this.
|
| Any help is very welcome,
| Thanks,
| Alex
|
| 



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